EN
Collections of chironomid pupal exuviae and male imagos were made in the Vistula between the reservoirs Wisła Czarne and Goczałkowice and its source spring Biała Wisełka and Czarna Wisełka. 80 species were identified, 6 of which were found to be new to Poland. The presence/absence and relative numbers of the species found in the samples were used to define the chironomid assemblage, that could be applied to evaluate the pollutant effect of sewage effluent, acidification, and "regulated stream" effect in this reach of the river.
PL
Collections of chironomid pupal exuviae and male imagos were made in the Vistula between the reservoirs Wisła Czarne and Goczałkowice and its source spring Biała Wisełka and Czarna Wisełka. 80 species were identified, 6 of which were found to be new to Poland. The presence/absence and relative numbers of the species found in the samples were used to define the chironomid assemblage, that could be applied to evaluate the pollutant effect of sewage effluent, acidification, and "regulated stream" effect in this reach of the river.